Reactions between solids through gaseous intermediates—I reactions controlled by chemical kinetics

✍ Scribed by H.Y. Sohn; J. Szekely

• Book ID: 103003287
• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 979 KB
• Volume: 28
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(73)85061-4

✦ Synopsis

A formulation is presented for the reaction between two solid species which proceeds through gaseous intermediates, involving the net generation of gases. Problems of this type are of considerable practical interest in the reduction of metal oxides with carbon.

The system is characterized by two dimensionless parameters which include the reaction rate constants, the shape, size and the relative amount of the solid reactants. Through the use of these parameters it is possible to identify the asymptotic regimes where the overall rate is controlled by the reaction of one of the solid species. These dimensionless parameters also allow the deli&ion of the criteria for the complete conversion of both solid reactants. In case of multiple reactions both stoichiometry and the kinetic factors must be taken to consideration in the establishment of these criteria.